Florence Anna Williams knows the question is coming anytime people learn that she is over 100 years old.“What’s your secret to longevity?” people have asked for the past several years.“I always worked hard,’’ she said. “I never smoked and never drank.” Other than that, there’s nothing special she’s done to live so long.“Hard work is what kept me going,” she said.Williams and her family celebrated her 105th birthday March 30 at Rosegate Assisted Living, where she’s lived since she was 98. Mayor Greg Ballard gave her a special certificate for reaching the milestone.She has a full head of thick hair, quick wit, a great memory and nice skin that she keeps supple with daily use of a moisturizer.She exercises with a little help by walking in the hallways and attends weekly Bible studies and church services at Rosegate every Sunday. Her hearing and vision are not what they used to be, but that doesn’t stop her from living her life to the fullest.Williams was born in Illinois, and her family (the Megenharts) moved to Coal City, Ind., southeast of Terre Haute. After the death of her father, her mother purchased a 5-acre farm where she and her siblings grew up. They had chickens and a cow, plenty of fruit trees and little money.